that eventually led to the shootout in watertown where the older brother was killed in an exchange of gunfire with the police. until thapoint the o brothers had at their disposal six improvised explosive devices, one was a pressure cooker bomb similar to the two that exploded at the marathon, the other five were pipe bombs. >> woodruff: for more now on what was reported and the continuing investigation, we are joined again by dina temple- raston of npr. test dina, welcome to the newshour again. just felt us-- fill us in on what investigators are learning thathey're passing on. >> well, in this particular case, when we're talking about the new york plot, what they learned actually happened in a 16 hour, a couple of marathon interrogation sessions that a special interrogation team had at dzhokhar tsarnaev's bedside. and it was during that time, before he was before he was read his rights that he provided some of these details about the spontaneous attack that they thought about having in new york. and they did have the capacity to do it, as commissioner kelly said. they had the bbs. it